A unit circuit includes a capacitive element having a first electrode, a second electrode, and a dielectric layer interposed between the first electrode and the second electrode, a transistor having a gate electrode connected to the first electrode, a first terminal supplied with one of a low potential and a high potential, a second terminal connected to a driven element, a first switching element controlling electrical connection between the gate electrode of the transistor and the second terminal, and a second switching element connected to the second electrode. A potential of the first electrode is set to a predetermined potential higher than a first potential, and the potential of the first electrode is set to the first potential in a state that the first electrode is electrically isolated from the predetermined potential by turning off the first switching element.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A unit circuit, comprising: a capacitive element having a first electrode, a second electrode, and a dielectric layer disposed between the first electrode and the second electrode; a transistor having a gate electrode connected to the first electrode, a first terminal, and a second terminal, one of the first terminal and the second terminal being connected to a driven element; a first switching element controlling an electrical connection between the gate electrode of the transistor and the second terminal; and a second switching element connected to the second electrode, a potential of the first electrode being set to a predetermined potential higher, by a threshold voltage of the transistor, than a low potential, by turning on the first switching element, and the potential of the first electrode being set to a first potential by supplying a first operation signal to the second electrode through the turned-on second switching element in a state that the first electrode is electrically isolated from the predetermined potential by turning off the first switching element, a second period, in which the potential of the first electrode is set to the predetermined potential by turning on the first switching element and a second operation signal is supplied to the second electrode through the turned-on second switching element, being provided subsequently to a first period in which the potential of the first electrode is set to the first potential, in a state that the first electrode is electrically isolated from the predetermined potential by turning off the first switching element after the second period is ended, the potential of the first electrode being set to a second potential by supplying a third operation signal, which is a continuation of the second operation signal, to the second electrode through the turned-on second switching element, and the first potential and the second potential having opposite polarities when the predetermined potential is used as a reference potential.
2. A unit circuit, comprising: a capacitive element having a first electrode, a second electrode, and a dielectric layer disposed between the first electrode and the second electrode; a transistor having a gate electrode connected to the first electrode, a first terminal supplied with one of a low potential and a high potential, and a second terminal connected to a driven element; a first switching element controlling an electrical connection between the gate electrode of the transistor and the second terminal; and a second switching element connected to the second electrode, a potential of the first electrode being set to a predetermined potential higher, by a threshold voltage of the transistor, than the low potential, by turning on the first switching element in a state that the low potential is applied to the first terminal, and the potential of the first electrode being set to a first potential by supplying a first operation signal to the second electrode through the turned-on second switching element in a state that the first electrode is electrically isolated from the predetermined potential by turning off the first switching element, a second period, in which the potential of the first electrode is set to the predetermined potential by turning on the first switching element and a second operation signal is supplied to the second electrode through the turned-on second switching element, being provided subsequently to a first period in which the potential of the first electrode is set to the first potential, in a state that the first electrode is electrically isolated from the predetermined potential by turning off the first switching element after the second period is ended, the potential of the first electrode being set to a second potential by supplying a third operation signal, which is a continuation of the second operation signal, to the second electrode through the turned-on second switching element, and the first potential and the second potential having opposite polarities when the predetermined potential is used as a reference potential.
3. The unit circuit according to claim 2 , the first potential being higher than the predetermined potential, and the second potential being lower than the predetermined potential.
4. The unit circuit according to claim 1 , the first operation signal and the second operation signal having the same potential.
5. A method of controlling a unit circuit including: a capacitive element having a first electrode, a second electrode, and a dielectric layer disposed between the first electrode and the second electrode; a transistor having a gate electrode connected to the first electrode, a first terminal supplied with one of a low potential and a high potential, and a second terminal connected to a driven element; a first switching element controlling an electrical connection between the gate electrode of the transistor and the second terminal; and a second switching element connected to the second electrode, the method comprising: setting a potential of the first electrode to a predetermined potential higher, by a threshold voltage of the transistor, than the low potential, by turning on the first switching element to set a potential of the first terminal; setting the potential of the first electrode to a first potential by supplying a first operation signal to the second electrode through the turned-on second switching element in a state that the first electrode is electrically isolated from the predetermined potential by turning off the first switching element; supplying a second operation signal to the second electrode through the turned-on second switching element in a state that the potential of the first electrode is set to the predetermined potential by turning on the first switching element after a period in which the potential of the first electrode is set to the first potential; and setting the potential of the first electrode to a second potential by supplying a third operation signal, which is a continuation of the second operation signal, to the second electrode through the turned-on second switching element in a state that the first electrode is electrically isolated from the predetermined potential by turning off the first switching element, the first potential and the second potential having opposite polarities when the predetermined potential is used as a reference potential.
6. An electronic device, comprising: a plurality of first signal lines; a plurality of second signal lines; a plurality of power supply lines supplied with one of a low potential and a high potential; and a plurality of unit circuits, each unit circuit comprising: a capacitive element having a first electrode, a second electrode, and a dielectric layer disposed between the first electrode and the second electrode; a transistor having a gate electrode connected to the first electrode, a first terminal supplied with one of the plurality of power supply lines, and a second terminal connected to a driven element; a first switching element controlling an electrical connection between the gate electrode of the transistor and the second terminal; and a second switching element connected to the second electrode, a potential of the first electrode being set to a predetermined potential higher, by a threshold voltage of the transistor, than the low potential, by turning on the first switching element to electrically connect the gate electrode and the second terminal of the transistor to each other in a state that the low potential is supplied to the first terminal through the power supply line, and the potential of the first electrode being then set to the first potential by supplying a first operation signal to the second electrode through the turned-on second switching element in a state that the first electrode is electrically isolated from the predetermined potential by turning off the first switching element, a second period, in which the potential of the first electrode is set to the predetermined potential by turning on the first switching element and a second operation signal is supplied to the second electrode through the turned-on second switching element, being provided subsequently to a first period in which the potential of the first electrode is set to the first potential, and in a state that the first electrode is electrically isolated from the predetermined potential by turning off the first switching element after the second period is ended, the potential of the first electrode being set to a second potential by supplying a third operation signal, which is a continuation of the second operation signal, to the second electrode through the turned-on second switching element.
7. The electronic device according to claim 6 , the first potential and the second potential having opposite polarities when the predetermined potential is used as a reference potential.
8. An electro-optical device having a plurality of scanning lines, a plurality of data lines, and a plurality of pixel circuits disposed to correspond to intersections between the plurality of scanning lines and the plurality of data lines, the electro-optical device comprising: a scanning-line driving circuit driving the plurality of scanning lines; and a data-line driving circuit to supply data signals to the plurality of data lines, the plurality of scanning lines including a plurality of first control lines and a plurality of second control lines, and each pixel circuit comprising: an electro-optical element; an n-channel transistor having a first terminal supplied with one of a low potential and a high potential, and a second terminal connected to the electro-optical element; a capacitive element of which one end is connected to a gate electrode of the transistor; a first switching element which is disposed between the gate electrode and a source electrode of the n-channel transistor, which is controlled by a first control signal supplied through one of the plurality of first control lines, and which connects the gate electrode and the source electrode of the n-channel transistor in a state that the low potential is applied to the first terminal; and a second switching element which is disposed between the other end of the capacitive element via a source electrode of the second switching element and the corresponding data line, which is controlled by a second control signal supplied through one of the plurality of second control lines, and which supplies the data signals to the other end of the capacitive element; wherein an initialization period, the scanning-line driving circuit generating the first control signal and the second control signal so as to turn on the first switching element, and the second switching element and the data-line driving circuit setting the level of the data signal to a reference potential, in an operation period subsequent to the initialization period, the scanning-line driving circuit generating the first control signal and the second control signal so as to turn off the first switching element and turn on the second switching element, the data-line driving circuit setting the level of the data signal to a first operation potential which is changed by a positive voltage corresponding to brightness of the electro-optical element from the reference potential, and then the scanning-line driving circuit generating the first control signal and the second control signal so as to turn off the first switching element and the second switching element, in a reset period subsequent to the operation period, the scanning-line driving circuit generating the first control signal and the second control signal so as to turn on the first switching element, and the second switching element and the data-line driving circuit setting the level of the data signal to a second operation potential, and a recovery period subsequent to the reset period, the data-line driving circuit setting the level of the data signal to the reference potential in a state that the scanning-line driving circuit generating the first control signal and the second control signal so as to turn off the first switching element and turn on the second switching element, and then the scanning- line driving circuit generating the second control signal so as to turn off the second switching element.
9. An electronic apparatus comprising the electro-optical device according to claim 8 .
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
April 14, 2006
June 1, 2010
Browse 5M+ US patents with plain-English claim translations and AI-generated analysis.